Jacob weintraub



(No Model.)

J. WEINTRAUB.

' LAMP.

No. 553,746. Patented Jan. 28, 1896.

/NVENTOH i/ffmmv v UNITED STATES P TENT OFFICE.-

JACOB VEINTRAUB, OF NEV YORK, N.- Y.

LAMP.

SPECIFICATION forming part of Letters Patent No. 553,745, dated January28, 1896.

Application filed June 13,1895. Serial No. 563,190. (No model.) i

To all whom, it may cancer/1,:

Be it known that 1, Moon WEINTRAUB, a subject of the Czar of Russia,residing at New York city, in the county and State of New York, haveinvented a new and useful 1mprovement in Lamps, of which the followingis a full, clear, and exact description.

My invention relates to an improvement in lamps, and especially to animprovement in alcohol-lamps, and the object of the invention is toprovide a diaphragmatic cap or cover, through the medium of which thevolume of the flame may be increased or diminished, or whereby the flamemay be extinguished, the said diaphragmatic cap being operated from theexterior of the lamp and, if desired, at some distance therefrom.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of the improved lamp. Fig. 2 is a verticalsection taken about centrally through the lamp. Fig. 3 is a bottom planview of the cover of the lamp-body containing the diaphragm. Fig. 4 is apartial plan view and a partial horizontal section of the saidlamp-cover, illustrating one of the members of the diaphragm in planView. Fig. 5 is a plan View of a member of the diaphragm, and Fig. 6 isan edge view of the same.

The body of the lamp A is given any desired shape, that shown in thedrawings being circular or substantially so, and in the bottom of thisbody-casing a receptacle B is contained, and in this receptacle aconical reservoir 10 is secured, the upper end whereof extends above thetop of the receptacle, as shown in Fig. 2, and the bottom or baseportion of the conical reservoir is provided with series .of apertures11, while the upper end of the made for the admission of air, leadinginto this space, as shown in Fig. 2, while near the upper portion of thebody-casing an annular partition 14 is formed, extending from the casingto the upper portion of the receptacle B, and this partition hasapertures 15 made therein to conduct upward the air introduced throughthe lower apertures 13. A bed 16, of asbestos or other like material, ispacked around the lower portion of the reservoir 10, and this bedusually extends within the receptacle to about a level with the annularpartition 11, being covered at the top by an apertured plate 17, andabove this plate the receptacle is provided with an upwardly-extendingflange 18, containing openings 19.

The body of the receptacle is provided with a prefera bly-re movablecover C,and this cover has an opening made in the top, the wall whereofis usually tapered, and'is substantially of the size and also the shapeof the apertured cover-plate of the asbestos bed, and the cap of thereservoir 10 extends upward within the central portion of this opening.A ring 21 is held to turn within the cover Q, being held in horizontalposition by means of pins 2 1 or their equivalents, as shown in Fig. 3.In the bottom face of the ring radial slots 22 are produced, and thering is adapted to carry in a measure a number of thin metal segmentalplates 23, and these plates are so grouped that they lie one on theother, forming a circular space at the center of the group. Each oftheseplates is provided with two lugs or studs, one stud, 24, being at oneend and extending upward, while the second stud, 25, is at the op--posite end and extends downward. The studs 24 serve to pivot the platesto the cover 0, while the studs 25 extend downward, one in each ofthe-radial slots of the ring. In fact, the grouping of these plates andtheir arrangement relative to the ring and to the cover are such as toform an iris-diaphragm, and the movement of the plates of the diaphragmis accomplished, preferably, by producing a segmental rack 26 on theunder face of the ring 21 and engaging said rack with a pinion n7,mounted on a spindle 28, extending outward through and beyond a side ofthe cover, the said shaft or spindle having a hand-wheel 29 or itsequivalent 011 its outer end. It will thus be observed, in operation,

that by turning thering 21 in. one direction the plates of the diaphragmwill each move an equal distance in a radial direction from the centerof the circle on which they are arranged, leaving a circular opening Dover the cover-plate of the asbestos bed, of a diameter equal to or lessthan that of the opening in the cover, and that by turning the ring inan opposite direction the diaphragm members will move readily toward thecenter, covering the bed-plate 19 to a greater or less extent; or thesaid diaphragm may be made to close tightly on the cap 12 of thereservoir, thus extinguishing the fiame of the lamp; and it is furtherevident that by means of the aforesaid diaphragm the volume of the flamemay be increased or diminished and rendered compact with little exertionon the part of the operator.

It is obvious that the alcohol is to be contained in the reservoir 10,and that it will pass out through the openings 11 into the asbestos bed,burning at the openings in the cover-plate of the latter.

Air is supplied to the flame through the openings 13 and 15 in thecasing and the openings 19 in the flange of the receptacle, air beingalso admitted through openings made in the sides of the cover, asindicated by the arrows in Fig. 2.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination with a lamp-burner, of a device forregulating the combustion-surface thereof, comprising a series ofpivoted plates arranged to form a centrally-apertu red diaphragm overthe combustion-surface, the said aperture being at all times concentricwith the axis of the burner, and mechanism for adjusting the size of theopening, substantially as specified.

2. A regulator for the combustion-s11rface of a lamp, comprising anapertured cover adapted to engage the body of the lamp and extendedabove the combustion-surface, a ring adapted to rotate in said cover, aseries of segmental plates having pivotal connection with the cover andhaving sliding connection with the ring and mechanism for 1'0- tatingsaid ring, for swinging the plates on their pivots, for adjusting thediameter of the opening over the combustion-surface, the said openingbeing at all times concentric with the center of the combustion-surfacc,substantially as specified.

3. The combination, with a lamp having a substantially horizontalcombustion-surface, of a ring-shaped cover therefor and means forregulating the opening thereof, comprising a series of segmental plateshaving pivotal connection at one end with the cover, a ring supported inthe cover and having radial slots into which projections from the platesextend, a rack formed on said ring, and a pinion engaging with the rackand having an outwardly-extending shaft, substantially as specified.

JACOB W EINTRAU'B. lVit-nesses:

IsIDoRE BERG, MAX GREEN.

